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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
Published on: October 1, 2019
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Ultrahigh-Q Lead Halide Perovskite Microlasers.
Haijun Tang1, Yuhan Wang1, Yimu Chen1
1Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, P. R. China.
Nano Letters
|April 12, 2023
Summary
We developed ultrahigh Q-factor perovskite microlasers using an etchless bound state in the continuum (BIC) and single-crystalline CsPbBr3 microplates. This breakthrough overcomes perovskite fragility for practical nanophotonic applications.
Area of Science:
- Materials Science
- Optics and Photonics
- Nanotechnology
Background:
- Lead halide perovskites are promising for micro- and nanolasers.
- Perovskite fragility challenges cavity engineering and high-quality (Q) mode achievement.
- Practical applications of perovskite lasers are hindered by these limitations.
Purpose of the Study:
- To demonstrate on-chip integrated perovskite microlasers with ultrahigh Q factors.
- To overcome the fragility of perovskites in laser cavity design.
- To provide a new paradigm for perovskite nanophotonics.
Main Methods:
- Combining an etchless bound state in the continuum (BIC) with chemically synthesized single-crystalline CsPbBr3 microplates.
- Patterning polymer microdisks on CsPbBr3 microplates to form BIC modes.
- Utilizing destructive interference of in-plane radiation from whispering gallery modes.
Main Results:
- Achieved ultrahigh Q-factor BIC modes in perovskite microlasers.
- Recorded a Q-factor of 1.04 × 10^5.
- Demonstrated high repeatability and controllability of the developed microlasers.
Conclusions:
- The developed method enables on-chip integration of high-Q perovskite microlasers.
- This approach overcomes the fragility limitations of perovskites for laser applications.
- Presents a novel strategy for advancing perovskite nanophotonics and laser technology.
